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Trade- Mark 牌号	Equivalent to China Standard 相当国标	Characteristics & application 特性和用途	Equivalent to AWS 相当AWS
D 802	EDCoCr-A-03	HRc38-47. Resistance to heat, wear and corrosion. Hardfacing of high temperature part such as the edge of thermo-cutter. HRc38-47，耐热、耐蚀、耐磨。堆焊高温工件如热剪切刀刃	ECoCr-A
D 812	EDCoCr-B-03	HRc45-50. Resistance to heat, wear and corrosion. Hardfacing of high temperature part such as internal-combustion engine valve. HRc45-50，耐热、耐蚀、耐磨。堆焊高温工件如内燃机阀	ECoCr-B
D 822		HRc≥53. Resistance to Wear and heat, bad shock resistance. Hardfacing of rotating blade wheel of boiler. HRc≥53，耐热、耐磨，但抗冲击性差。堆焊锅炉旋转叶轮
D 832	EDCoCr-C-03	HRc≥50. Wear and heat resistance. Hardfacing of high temperature part such as hot-rolling guided way. HRc≥50，耐热、耐磨。堆焊高温工件如热轧导轨	ECoCr-C
D 842	EDCoCr-D-03	HRc28-38. Corrosion and thermo-fatigue resistance, work harding. Hardfacing of hot forging die. HRc28-38，耐蚀、抗热疲劳，具有加工硬化性。堆焊热锻模

D802钴铬钨合金焊芯的钴基堆焊焊条，采用直流反接，堆焊金属在650℃工作仍能保持良好的耐磨性和耐腐蚀性，用于要求在650℃左右工作仍能保持良好的耐磨性和耐腐蚀性的场合，或承受冲击和冷热交错的部位，如堆焊高温高压阀门及热剪切刀刃等。

   熔敷金属化学成分/%
   C-0.70～1.40 Si≤2.0 Mn≤2.0 Cr-25.0～32.0 Fe≤4.0 W-3.0～6.0 其他≤4.0 Co-余量
堆焊层硬度HRC≥40

D812钴基堆焊焊条
D812钴铬钨合金焊芯的钴基堆焊焊条，采用直流反接，堆焊金属在650℃工作仍能保持良好的耐磨性和耐蚀性，用于高温高压阀门、高压泵的轴套筒和内衬套筒以及化钎设备的斩刀刃口等
熔敷金属化学成分/%
C-1.00～1.70 Si≤2.00 Mn≤2.00 Cr-25.0～32.0 Fe≤5.0 W-7.0～10.0 其他≤4.0 Co-余量
堆焊层硬度HRC≥44